SDL_HID_GET_REPORT_DESCRIPTOR(3)

💖 SDL_hid_get_report_descriptor 💖

okay bestie, we're in the SDL3 FUNCTIONS section of the manual and this one is literally the key to unlocking what a HID device is actually made of 🔑✨

✨ NAME ✨

SDL_hid_get_report_descriptor — grab a report descriptor straight off a HID device, no cap 🎀

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_hidapi.h>

int SDL_hid_get_report_descriptor(SDL_hid_device *dev, unsigned char *buf, size_t buf_size);

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🦋 DESCRIPTION 🦋

so here's the tea: you have to bring the buffer, bestie. this function does not allocate anything for you — you show up with a preallocated buffer and the descriptor gets copied into it. that's the whole vibe 💅

and listen, the recommended size for that preallocated buffer is 4096 bytes. that's the number, that's the move, don't be out here guessing 🙈

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👑 FUNCTION PARAMETERS 👑

• dev — a device handle returned from SDL_hid_open(). like, you gotta already have your device open, this function isn't gonna do it for you 🫶
• buf — the buffer to copy the descriptor into. this is the preallocated one we talked about, she's ready and waiting 💖
• buf_size — the size of that buffer, in bytes. tell her how much room she has, fr fr ⭐

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⭐ RETURN VALUE ⭐

returns the number of bytes actually copied, or -1 on failure 😭 — and if it's -1, call SDL_GetError() for more info, because she will absolutely tell you what went wrong 💀

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🌈 AVAILABILITY 🌈

this function is available since SDL 3.2.0 ✨ (so if you're on something older… yeah, it's giving nothing, bestie, sorry 🙈)

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okay that's the whole page, you ate that 🎀💅

this was brought to you by Simple Directmedia Layer — SDL 3.4.18, iconic behavior only 👑💖 stay hydrated, read your return values, and always preallocate your buffers bestie 🌸🦋